Transmission of power from a prime mover to a load.



A. 0. KING & P. HAMER.

TRANSMISSION OF POWER FROM A PRIME MOVER TO A LOAD.

APPLICATION FILED DEC. 19, 1908.

Patented Jan. 4, 1910.

4 SHEETSSHEET 1.

d-rf/vur C/ arles K A. G. KING & F. HAMER.

TRANSMISSION OF POWER FROM A PRIME MOVER TO A LOAD.

APPLICATION FILED DEO.19, 1908.

945,398. Patented Jan.4, 1910.

4 SHEETS-SHEET 2.

% '3 TWA AL A. 0. KING & F. HAMER.

TRANSMISSION OF POWER FROM A PRIME MOVER TO A LOAD.

APPLICATION FILED DEG. 19, 1908.

Patented Jan. 4, 1910.

4 SHEETS-SHEET 3.

@eds rip/1 H 7 A. G. KING & P. HAMER. TRANSMISSION OF POWER FROM A PRIMEMOV-ER TO A LOAD.

APPLICATION FILED DEC. 19, 1908.

945,398, Patented Jan.4, 1910.

4 SHEETSSHEET 4.

UNITED sr rss Pa EN OFFICE.

THUR mans KING, 0] 13141110101, AID rmmcx BAKER, Oi HAYES,

' mlenm.

TBANBIIBSION OF POWER I'M! A Pm OVER TO A LOAD.

lpeolnoation of letters Patent.

Patented Jan. 4,1910.

To allwhomitma concern:

lie .it known tiat we, ARTHUR Cnannas Kmo and FREDERICK I'IAMEB,subjects of the King of Great Britain and Ireland residm at SydneyGrove, Sydney street, City Roa lslington, in the count of Middlesex,England, and Anchor Bri ge House, Hayes, in the county of Middlesex,England, res ctivcly, have invented new and useful mprovements in orRelatin r to the Transmission of Power from a rime Mover to a Load, ofwhich thefollowing is a specification.

This invention relates to the transmission of power from a prime moverto a load, and, in particular, to power transmission systems 'ormechanisms in which the rime mover is connected with, or is gears to,the .load through the intermediar of a combined clutch and variable specear device comprising a dynamo-electric e ement in which the armature isconnected with, say, the load and'the field magnet. structure isconnected with, say, the prime mover, and both the armature and thefield magnet structure rotate, variation in the drive or rate of motionbeing efi'ected by alteration in the strength of the magnetic field andin the slip or ag of the armature.

The invention will be particularly applicable for use in transmittingpower from the motor on a motor ropelled road vehicle to the road'wheels and in connection with such a vehicle the combined clutch andvariable speed gear device aceordingjo this invention is shown in Figure1, 1 sing the rime mover,v2 the exciter and 3 the com ined clutch andvariable speed gear device. The prime mover is shown in connection witha motor propelled road vehicle as an internal combustion engine, but .itwill be obvious that when the invention is used in other connectionsthat the prime mover may be of a different type. I

In the accompanying drawings, which are purely dia rammatic andillustrative, Fig. 2 is a sectlon on the line A--A of Fig. 3; Fig. 3 isa. section on the line BB of F i 2; and Fig. 4 is a section on the lineC- of Fig. 2 of one construction of combined clutch and variable speedgear device in accordance with this invention. Fig. 5 is a section onthe line D. D. of Fig. 7, Fig. 6 is a section on the line E E- of Fig.7, Fig. 7

is a section on the line F F of Fig. 6 of a modified arrangement;

magnet structure is connected directly with the main or 'drivin shaft 4of the prime mover 1, but the fie d ma et structure ma be connectedtherewith in irectly, as throng gearing. The field magnet structure isof compound formation, that is to say, it has a plurality of airs offield magnets or poles 5 at these fi d magnets or poles, instead 0 beingspaced apart in a circle so as to act upon a single armature mounted torotate within the s ace so inclosed, as in ordinary multipolarynamo-electric machines, are arranged in suchwise that each pair offield magnets or poles acts upon an armature.

n Fig. 2, three pairs of field magnets or poles are shown, also threearmatures 7 the arrangement as'a whole may be considered as three searate two-pole dynamo-electric machines. he several pairs of fieldmagnets or poles 5 are earned by a carrier 6, which comprises two disksimmovably secured upon the shaft 4 and spaced a art, the several airs offield magnets or p0 es bein mounted between the two disks and dis oseshown in ig. 2., When the rime mover 1 is started up, the shaft 4 will erotated and with it the carrier (3 and the field magnets or polescarried thereby. As before stated,

each pair of field magnets or poles acts upon an armature 7 and eachpair of field magnets or poles with their armature may be regarded as aseparate unit or two-pole ynamo-electric machine.

In the arrangement illustrated in Fi s. 2 to 4, the field magnets orpoles have een shown arranged in such wise that the spindles 8 of thearmatures must be placed parallel with the shaft 4. The spindles 8 aretherefore mounted at their ends in bearings 9 formed in the disk 6..When, therefore, the carrier 6 rotates with the shaft 4 the armatureswill be carried around therewith. Each armature spindle 8'is made ofsuch length that one end projects through and beyond its bearing 9 inthe disk 6. This projecting end of the armature spindle is provided witha spur wheel 10. The three spur wheels 10 ar with a central or sun wheel11 mounted on the end of the shaft 12 to be driven, the shaft 12 beingco-axial with us In the construction illustrated, the field the .shaft4. The arrangement as a whole forms an epicyclic or sun and planet geartrain, but, instead ofthe usual mechanical braking carried out by, say,an externally or internally toothed gear wheel, wholly or partiallyretarded, the braking is effected electrically as will now be described.When the prime mover-1 is started u the carrier- 6 and the several pairsof'fiel magnets or oles 5 .will be rotated with and by the shaft at thesame time, the armatures 7 will also be carried around with and by thecarrier 6. The armatures 7 will, in addition to the rotary motion 'ustmentioned, have a rotary motion about t eir own axes and this lattermotion will be caused by the spur wheels 10 gearing with and rollingidly over the sun spur wheel 11 on the end of the driven shaft 12.

When it is desired to transmit power from the prime mover 1 to thedriven shaft 12 and to overcome its resistance to motion due to a load,the field magnets or poles are energized and the armatures 7consequently each rotate in a magnetic field. The current required toenergize the field magnets or poles may be obtained from a source ofpower, =-uch as a secondary battery, or from an exciter, such as 2. Inthe arrangement illustrated in Fig. 1, the exciter 2 is slung from thechassis of the vehicle and its armature is driven from the shaft 4through earing. Current generated is led to terminals connected throughslip rings and .brushes with the windin 13 on the field magnets or poles5. The mtensity of the current so supplied is r lated by a resistancedevice 14. The win ings of the field magnets-or pales 5 are preferablyall connected 1n series. hen the armatures 7', which are preferablyrovided with short circuited windings as in ordinary induction motors,are rotated in automatically var the magnetic fiel'ds so set up, eacharmature will exert a torque, which Wlll. de end upon the strength ofthe magnetic fie d, on the armature reactions and on the amount ofresistance to motion of the driven shaft 12. The torque so set up willcause each spur wheel '10 to set up a driving cou 1e or to bind with thesun wheel 11, an thereby transmit power from the primemover to the load.B varying the strengths of the magnetic fie ds the torque will bevaried, and consequently the power transmitted from each s ur wheel 10through the sun wheel 11 to t e shaft 12 will be readily controllable.Conversely, by maintaining the strength of the magnetic fieldsat aconstant value, any variation in the load, such as would fre uentlyoccur in motor propelled road vehic be, by increasing or dimimshin theresistance to motion of the shaft 12, wi l the amount of drivin torquetransmitte through the spur whee s 10 to the sun wheel 11. In thismodified arrangement shown in Figs. 5, 6 and 7, the armatures 7 instead.of driving through s or wheels 10 and 11 the shaft 12, are causcr todrive through bevel wheels 1!) and 16, each armature spindle car ing a.bevel wheel 15 which gears with the bevel wheel 16 on tho end of theshaft 12. With this arrangement, the armature spindles are not arrangedparallel with the shaft 4 but at right angles thereto and are mounted attheir-ends in brackets 17 secured to the carrier 6.- In both arranements, the space between the disks 6 is inc osed by a cover or casing18. The combined clutch and variable speed gear device -will thereforehave the outward appearance of a flywheel which, in practice, it forms.

It will be understood that our invention is not limited to the specificarrangement and manner of controlling the field magnets but variousmodifications thereof might be employed without departing from thespirit of our invention. a

What we claim is I 1. In an a paratus of the class described, thecombinatlon with a driving motor, of a shaft to be driven, dynamoelectric machines having one structure thereof driven by said.

motor and the other structure connected with said driven shaft through agear train normally inoperative and means adapted to ener 'ze saidlatter named structure to cause said gear train to rotate said drivenshaft.

2. n an apparatus of the class described, the combination with a motordriven shaft, of a shaft normally free from said motor, dynamo electricmachines having one structure thereof driven by said motor driven shaftand the otherstructure connected with said free shaft through a eartrain means adapted to energize said rst named structure to cause saidgear train to rotate said free shaft and means adapted to vary the torno of the dynamo structure geared to sai free shaft whereby the powertrans mitted thereto may be varied.

3. In an apparatus of the class described, the combinatlon with a motorand its shaft, of a shaft to be driven, a plurality of two pole dynamoelectric machines mounted about said motor shaft, the armatures of saidmachines being geared to said shaft to exerted by said armatures an thepower transmitted to said shaft to be driven.

ing the torque exerted by said armatures and the power transmitted tosaid shaft to be driven.

5. h an apparatus of the class described,

the eombination'with a motor and its shaft,

of a shaft to be driven, a plurality of dynamo field structuresconcentrically arranged about said motor shaft and adapted to r0- tatetherewith, armatures for said field structures, spin'dles upon whichsaid armatures are mounted, sun and planet gearing adapted to connectsaid armature spindles with said shaft to be driven and means forvarying the torque exerted by said ar1natures and the power transmittedto said shaft to be driven.

(i. In an apparatus of the class described, the combination with a motorand its shaft, of a shaft to be driven, a plurality of concentricallyarranged dynamo field structures adapted to rotate with said motorshaft,

armatures for said field structures, spindles on which said armaturesare mounted, sun and planet gearing connecting said armature spindleswith said shaft to be driven, a generator connected with said motorshaft and adapted to energize said field structures and currentcontrolling means adaoted to controlthe energization of said fielstructures whereby the power transmitted to said shaft to be driven maybe varied.

Dated this 28th day of November, i908.

ARTHUR CHARLES KING. FREDERICK HAMER.

\Vitncsses ll. 1). J AMESON, R. F. \Vnmmas.

